.container{
    display: flex;
    width: 80%;
    margin: 0 auto;
    padding: 20px;
    border-radius: 20px;
    border: 1px skyblue solid;
    justify-content: space-around;
    height: 600px;
}
.conatiner-nav{
    width: calc(30% - 40px);
    padding: 20px;
    border: 1px aqua dashed;
    border-radius: 20px;
}
.container-show{
    padding: 20px;
    width:calc(65% - 40px);
    border-radius: 20px;
    border: 1px orange solid;
}
.nav-item{
    border: 1px skyblue solid;
    background-color: azure;
    border-radius: 10px;
    height: 40px;
    width: 100%;
    margin-bottom: 10px;
}
.nav-item:hover{
    color: blue;
}